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Journal of Composite Materials
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Modelling and Experimental Analysis of Multi-Coating Effect on Thermal Expansion and Thermal Stresses of Polymer Fiber-Reinforced Composites

Amen Agbossou

Laboratoire Matériaux Composites (LaMaCo), ESIGEC—Université de Savoie, 73376 Le Bourget du Lac (Chambéry) France

Anne Bergeret

L3MO, École des Mines d'Alès, 6 Avenue de Clavières, 30319 Alès Cedex France

Due to Thermal Expansion Coefficient (TEC) mismatch between the fiber and matrix, thermal stresses can appear during cooling from the processing temperature to room temperature. In this paper, we (1) analyze experimentally the effect of coating on the TEC of fiber composite and (2) present a thermal self-consistent model to predict thermal stresses and TEC in multi-coated fiber. Over a large range of temperature (40°C to 200°C), the experimental results show several interesting features that result from the presence of (Silane and Polyvinylacetate) coating. These results are then modeled theoretically using the proposed thermal self-consistent model. The results show that variations in thermal stress may initiate damage in the vicinity of the fiber or promote interface contact during curing of the composite.

Key Words: thermo-elasticity • thermal stress • thermal expansion coefficients interphase • multi-coating • fiber composite

Journal of Composite Materials, Vol. 33, No. 15, 1410-1432 (1999)
DOI: 10.1177/002199839903301503
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